package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.DishDTO;
import com.sky.dto.DishPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.DishFlavor;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.DishFlavorMapper;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealDishMapper;
import com.sky.result.PageResult;
import com.sky.service.DishService;
import com.sky.vo.DishVO;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.List;

@Service
@Slf4j
public class DishServiceImol implements DishService {

    @Autowired
    private DishMapper dishMapper;

    @Autowired
    private DishFlavorMapper dishFlavorMapper;

    @Autowired
    private SetmealDishMapper setmealDishMapper;

    @Override
    @Transactional
    public void saveWithFlavor(DishDTO dishDTO) {

        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO, dish);
        //向菜品表插入一条数据
        dishMapper.insert(dish);
        //获取生成的主键值
        Long dishId = dish.getId();
        //向口味表插入n条数据
        List<DishFlavor> flavors=dishDTO.getFlavors();
        if(flavors!=null&&flavors.size()>0) {
            flavors.forEach(dishFlavor -> {
                dishFlavor.setDishId(dishId);
            });
            dishFlavorMapper.insertBatch(flavors);
        }
    }

    //菜品分页查询
    @Override
    public PageResult pageQuery(DishPageQueryDTO dishPageQueryDTO) {
        PageHelper.startPage(dishPageQueryDTO.getPage(),dishPageQueryDTO.getPageSize());
        Page<DishVO> page = dishMapper.pageQuery(dishPageQueryDTO);
        return new PageResult(page.getTotal(),page.getResult());
    }

    //菜品批量删除
    @Override
    @Transactional
    public void deleteBatch(List<Long> ids) {
        //判断当前菜品能否删除--是否存在起售中??
        for(Long id:ids) {
            Dish dish=dishMapper.getById(id);
            if(dish.getStatus() == StatusConstant.ENABLE){
                //处于起售中 不能删除
                throw new DeletionNotAllowedException(MessageConstant.DISH_ON_SALE);
            }
        }
        //是否被套餐关联
        List<Long> setmealIds =setmealDishMapper.getSetmealIdsByDishIds(ids);
        if(setmealIds!=null&&setmealIds.size()>0) {
            //菜品被关联了 不能删除
            throw new DeletionNotAllowedException(MessageConstant.DISH_BE_RELATED_BY_SETMEAL);
        }
        //删除菜品数据
      /*  for(Long id:ids) {
            dishMapper.deleteById(id);
            //删除菜品关联的口味数据
            dishFlavorMapper.deleteByDishId(id);
        }
        */
       //优化
        dishMapper.deleteByIds(ids);
        dishFlavorMapper.deleteByDishIds(ids);




    }
}
